This is the supplement website for the books:

Information about these books, such as table of contents, source code, and errata, can be found by clicking the Books menu item. If you need to download the DirectX 9.0/10.0/11.0 SDK, you can find it here at DirectX. In addition, you can find extra articles, sample source code, and programs by clicking the Articles and Code menu item. The message forum is available for readers to communicate with each other, and ask questions.